Carrd - Simple, responsive one-page site creator.
calibre - Ebook manager, viewer & converter
Webflow CMS - Build professional dynamic websites without any code
FBReader - FBReader is an e-book reader for various platforms. Features:
Grid Layout Builder by Webflow - A completely visual way to build CSS grid–powered layouts.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.